It is interesting to note that Bukhari wrote a book about
the narrators (Zuafa-us-sagher). What is even more interesting is that Bukhari's
book condemns several narrators including: ... Khamsan bin Minhal ...
as unreliable. However, the Hadith-collection of Bukhari in the its modern
form actually includes many traditions narrated by these very individuals!
Obviously, these traditions, which Bukhari rejected, were inserted in his
book following his death.

a narrator called "Khamsan bin Minhal".

1. Did Al-Bukhari Say Khamsan Bin Minhal
"Unreliable"?

There is no such name mentioned in Kitab
al-Du`afa al-Saghir at all! As for the "reliability"of
this non-existing narrator, we do not have to worry about it. The conclusion
is that al-Bukhari could not have "rejected" the traditions from a
non-existent narrator.

The closest name that we have in Kitab
al-Du`afa is Kahmas bin al-Minhal. Al-Bukhari says that he was
Qadari.

307 - Kahmas Ibn al-Minhal: From Sa`id
Ibn Abi `Arubah. Isma`il Ibn Hafs narrated from his father:
He was accused for his belief about qadar[i.e.,
he was a qadari].[1]

In the footnotes we read:

307 - He has a rejected hadith for
which al-Bukhari included him in Kitab al-Du`afa. Abu
Hatim said: His rank is that of truthfulness. [refer to al-Mizan
416/3 and al-Kabir 240/7][3]

Al-Bukhari elaborates in his Kitab al-Tarikh
al-Kabir:

1029 - Kahmas Ibn al-Minhal from Sa`id
Ibn Abi `Arubah from Qatadah from al-Hasan from Samrah Ibn Jundub said:
The Prophet, peace be upon him, forbade selling (Al-Sinin - 4). Narrated by
Sa`id Ibn `Ufayr, he heard Kahmas al-Sudusi, said Isma`il Ibn Ja`far from
his father, he used to accuse him about qadar.[3]

Summing up, there exists nobody by name Khamsan b. Minhal
in al-Bukhari's Kitab al-Du`afa.
The name that exists is Kahmas b. al-Minhal who was accused of being a qadari,
but was truthful.

2. Traditions Of Kahmas B. Al-Minhal In The
Sahih Of Al-Bukhari

Only one hadith of Kahmas is narrated by al-Bukhari.

The Prophet once climbed the mountain of Uhud with Abu
Bakr, `Umar and `Uthman. The mountain shook with them. The Prophet said (to
the mountain), "Be firm, O Uhud! For on you there are no more than a Prophet,
a Siddiq and two martyrs. [Kitab al-Manaqib, No. 3410]

The isnad bundle of this hadith looks like this:

The hadith is collected by al-Bukhari through isnadsindependent of Kahmas b. al-Minhal. Furthermore, this hadith is
also available through Shu`bah b. al-Hajjaj and the isnad is independent
of Sa`id b. Abi `Arubah.

3. Conclusions

The Christian missionaries have made a charge that after the death
of al-Bukhari "many" rejected "traditions" of "unreliable"
narrators were added to his Sahih. They have
also claimed that al-Bukhari himself has "condemned" these narrators
in his Kitab al-Du`afa al-Saghir.
A detailed investigation has revealed that six out of ten narrators does not
even exist in Kitab al-Du`afa al-Saghir
leave alone al-Bukhari condemning them as "unreliable" and their traditions
"rejected". Whoever are present in al-Bukhari's Kitab
al-Du`afa either belonged to a early sects of Islam, such as the
qadariyyah, murji'ah, etc. It is interesting to note that al-Bukhari
did not condemn any of these narrators as unreliable at all, contrary to
the Christian missionaries' claim! Furthermore, the analysis of isnad
bundles of allegedly "rejected" hadiths narrated by these allegedly
"unreliable" narrators have shown the existence of parallel isnads
independent of these narrators; many of them also present in the collections
earlier and later than that of al-Bukhari. This leads us to the conclusion that
after the death of al-Bukhari "many traditions" of allegedly "unreliable"
narrators could not have been added to his Sahih.
Even a beginner in hadith criticism would have figured out that it would
make more sense to have ensured that all narrators were famous and reliable
so that the hadiths would be accepted by the later day scholars
without suspicion.

4. Acknowledgements

We would like to thank Abu Hudhayfa for giving us a good start
for a refutation of this alleged claim. He suggestions were extremely useful
and without them a comprehensive refutation like this would not have been possible.
May Allah reward him profusely. And may Allah accept it from us.